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Fair Value Measurements - Assets And Liabilities Measured At Fair Value (Details) - Fair Value, Recurring - USD ($)
$ in Thousands
Dec. 25, 2020
Mar. 27, 2020
Assets:    
Total assets $ 22,840 $ 51,722
Liabilities:    
Contingent consideration 7,800  
Total liabilities 7,800  
Level 1    
Assets:    
Total assets 22,840 51,722
Liabilities:    
Contingent consideration 0  
Total liabilities 0  
Level 2    
Assets:    
Total assets 0 0
Liabilities:    
Contingent consideration 0  
Total liabilities 0  
Level 3    
Assets:    
Total assets 0 0
Liabilities:    
Contingent consideration 7,800  
Total liabilities 7,800  
Money Market Funds    
Assets:    
Cash and cash equivalents, fair value disclosure 16,320 46,337
Restricted cash and restricted cash equivalents, fair value disclosure 6,520 5,385
Money Market Funds | Level 1    
Assets:    
Cash and cash equivalents, fair value disclosure 16,320 46,337
Restricted cash and restricted cash equivalents, fair value disclosure 6,520 5,385
Money Market Funds | Level 2    
Assets:    
Cash and cash equivalents, fair value disclosure 0 0
Restricted cash and restricted cash equivalents, fair value disclosure 0 0
Money Market Funds | Level 3    
Assets:    
Cash and cash equivalents, fair value disclosure 0 0
Restricted cash and restricted cash equivalents, fair value disclosure $ 0 $ 0